endomeninx
noun
en·do·me·ninx
| \ ˌen-də-ˈmē-niŋ(k)s
, -ˈmen-iŋ(k)s
\
, -ˈmen-iŋ(k)s
\
plural endomeninges\ -mə-ˈnin-(ˌ)jēz
\
\
Medical Definition of endomeninx
: the layer of embryonic mesoderm from which the arachnoid coat and pia mater of the brain develop